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Old 08-09-2005, 01:47 PM   #26
Jon [in CT]
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Quote:
Originally Posted by hotrod
I am running the Walbro 255 l/h pump and so far no sign of ANY problems.
FWIW, according to the post at http://www.turbobuick.com/forums/sho...77&postcount=1, the company that makes Walbro pumps recommends against using their 255 l/h high pressure pumps with E85 fuel. People are free to contact them at contactus@tiautomotive.com to find out for themselves.
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Old 08-09-2005, 06:25 PM   #27
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Thanks Jon, I hadn't seen that info!

Larry
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Old 08-09-2005, 06:48 PM   #28
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Fuel pumps are $100...how much do you save on gas a year?

...Lets see...I get about 20mpg average...And I drive a whooollleee lot. I've had the car almost a year, got it brand new, and its got 32k on it.

So. About 3k mi a month. I usually get about 300mi per tank. So every month, about 10 tanks of gas. I drive ALOT.

So. 10 tanks...15gal tanks...150gals/month. Gas is about 2.60/gal here. So, $390/month on gas.

Using 95% E85(142gal/month), the price drops to $340/month(assuming a price equal to regular unleaded gas). Averaging out to an overall savings of $600/year. That's 6 fuel pumps.
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Old 08-10-2005, 08:36 AM   #29
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Quote:
Originally Posted by hotrod
Quote:
Are you sure you don't mean that E85 will allow more advance?

Just passing on what I've found in the various sources. Logically you are correct, but one source says simply that MBT timing is the same for E85 and gasoline, and another report says at low loads the E85 and gasoline like the same MBT timing but at high loads MBT timing for the E85 is slightly more advance.
Heeey ... I think that was me you were quoting.

I only meant that it would allow more advance in terms of knock because of the higher octane. I think I posted that in response to what someone said about tuning it under load ... but I might be mistaken.

This is a very good thread. I love threads with pages of technical information.

-Adrian
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Old 08-11-2005, 12:52 AM   #30
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I have ran 30% e85 blend in my 02 WRX for 3 full tanks now. I believe I had a low IAM w/ the COBB AP stage 2 because I reset my computer, and drove about 250 miles on it.

Then I broke out my g-tech pro, and 5 times I ran between 14.0-14.2 in 1/4 mile, and trapped between 100-102. The temp was 81-82 degrees , 1/4 tank of gas, baby seat in the car. Didn't remove any other weight.

Two weeks later while on my 2nd tank of 30% blend E85 I ran 3 runs. BTW I rest ECU after about 3 days after using E85, Then put on about 400 miles til I decided to do a run. Between the 3 runs I ran 13.6-13.7 1/4 miles, trapped 103.X all 3 times. Outside temp was 87 degrees. I had a 1/2 tank of gas, baby seat in car, and 30 lb. stroller, 25 pound baby.
And in my 13.73 (slowest) run I crapped on the clutch in the 1-2 shift!

I was amazed. I took a pic of my g-techpro but only on my best run (13.6). This is the best my car has ran.

I consistantly ran 14.0-14.1's for the past 6 months or so. So it is not like I changed my driving style within the past 2 weeks. I believe my IAM was low, and decreasing power, now E85 increased the IAM, maximizing power.

Other than the car obviously having better numbers, the car runs fine,with the 30% blend. No funny revving/bucking or anything. Drives perfectly fine.

I usually put in between 3.8-4.2 gallons in the car when I'm close to E (under 1/4) and add the rest 93.

BTW I'm running COBBAP stage 2 93

Hope this may help

MAX

oh and I never ran any 1/4 miles with my son in the car! Thought it would spice up the info!
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Old 08-16-2005, 02:15 PM   #31
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Why is this not a Sticky!!!!!!!!!!!!!!!
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Old 08-16-2005, 03:13 PM   #32
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I have been looking at different threads and I do not see if anyone with an STI is running this stuff and if so, are the STI injectors good enough since the WRX owners are just installing STI injectors.
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Old 08-18-2005, 04:09 PM   #33
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/me ponders.... 50/50 E-85 and water mix for a water injection setup...

Jorge (RiftsWRX)
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Old 08-18-2005, 10:37 PM   #34
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The 15% gasoline will settle out but if you decant the water ethanol mix it would work just fine.

Larry
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Old 08-19-2005, 02:05 AM   #35
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Quote:
Originally Posted by icantdrive75
Fuel pumps are $100...how much do you save on gas a year?

...Lets see...I get about 20mpg average...And I drive a whooollleee lot. I've had the car almost a year, got it brand new, and its got 32k on it.

So. About 3k mi a month. I usually get about 300mi per tank. So every month, about 10 tanks of gas. I drive ALOT.

So. 10 tanks...15gal tanks...150gals/month. Gas is about 2.60/gal here. So, $390/month on gas.

Using 95% E85(142gal/month), the price drops to $340/month(assuming a price equal to regular unleaded gas). Averaging out to an overall savings of $600/year. That's 6 fuel pumps.
not to mention better performance
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Old 08-19-2005, 05:51 AM   #36
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Better performance is a given, assuming you have supporting mods like the injectors and all that. Just saying, the price of replacing fuel system components(if any need be replaced) is minimal compared to fuel savings. Especially gas as bad as it is now. $3.00/gal for premium some places. Can you believe it. I couldn't when it went up to 2.
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Old 08-19-2005, 10:25 AM   #37
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thanks for the informative post, i'll be looking for some local stations around my area now
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Old 08-19-2005, 05:47 PM   #38
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thanks for this great thread. definitely will try some next time i go to san diego
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Old 08-19-2005, 05:48 PM   #39
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and can somebody sticky this please?
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Old 08-19-2005, 07:11 PM   #40
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Quote:
Originally Posted by icantdrive75
Better performance is a given, assuming you have supporting mods like the injectors and all that.
If you're modifying your Subaru to run E85, you wouldn't buy expensive injectors. Instead, you'd install an adjustable fuel pressure regulator. That way, if you found that E85 was temporarily inaccessible, you'd simply lift the hood and adjust your FPR to the "stock" 43.5 PSI setting.
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Old 08-20-2005, 01:23 AM   #41
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Quote:
Originally Posted by Jon [in CT]
If you're modifying your Subaru to run E85, you wouldn't buy expensive injectors. Instead, you'd install an adjustable fuel pressure regulator. That way, if you found that E85 was temporarily inaccessible, you'd simply lift the hood and adjust your FPR to the "stock" 43.5 PSI setting.
or have more than one map for you EM...if I had it, I'd have an ethanol map and a 93 octane map
simply switch maps
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Old 08-20-2005, 02:01 AM   #42
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Quote:
If you're modifying your Subaru to run E85, you wouldn't buy expensive injectors. Instead, you'd install an adjustable fuel pressure regulator.
Of course it depends a bit on your priorities and local conditions. One strategy would be to use fuel pressure and possibly a small change in injectors to reach a point where your 0 fuel trim location is half way between and E85 tune and a gasoline tune, and let the ECU take you most of the way to a final tune using long term fuel trim.

The other would be to have a Utec or similar tuning solution with 2 or 3 maps. A gasoline only max economy map, and middle of the road runs reasonably well on either fuel, and a max power E85 only map.


I see lots and lots of options here depending on peoples budgets, local supply conditions and personal agendas.


I'm going to go with the duplex approach with upgraded injectors and an adjustable fuel pressure regulator that at max pressure setting will give a max power tune for E85, and at minimum pressure will give a middle of the road tune that gives good performance on high ethanol mixes and acceptable performance on gasoline only using the fuel trim authority of the reflashed ECU.

now if we can get Ecutek to come look at the code and increase the fuel trim authority of the ECU then the whole problem goes away with an injector that falls in the middle of the required flow for both gasoline and E85.

Larry
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Old 08-20-2005, 12:43 PM   #43
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Quote:
Originally Posted by sKOOTeR WRX
I am in the same boat as you are, do you know of any current studies where they have proven that ethnol production is a net loss. Many of the studies I have read are fairly old and are using incorrect numbers, and some tend to say it is a net loss others say it is a net gain.
Nuclear?

I cant seam to figure out why in the world we cant re organize production of power. In a perfect world all production of energy would/could be nuclear, and ethanol/hydrogen would be perfectly viable options. Regional nuclear powered hydrogen production facilities would/could/should? be the future.

I had a proffesor in college who was anti nuclear all the way, then she visited a few other countries powered by newer nuclear plants, and came home a believer. They had better plans for waste disposal than the US, and an updated grid to cut down on line loss. Or even better lets produce hyrogen, and de centralize electrical power, w/hydrogen powered fuel cells running our homes.

ohh noes hydrogen in the gas pipes

Josh
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Old 08-20-2005, 01:16 PM   #44
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the japanese already have some hydrogen internal combustion engines cars...prototypes that is
turbo'd and supercharged models...all experiemtning...I'll see if I can find th article
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Old 08-20-2005, 01:16 PM   #45
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Well I read all this and some other threads on here. I went and and bought 8 gal of E85 to mix with the almost 8 Gallons of Shell 93. Drove for 10 miles. Then on the freeway opened her up. I didn't notice to much in performance, but since 93 was $2.89 a gallon and E85 was $2.34 I noticed a savings. I drove the rest of the way home, no cell lights not hesitation I even stopped by the local dealer to talke a look at the new 06 STI in person and then drove home. I have put 35 miles on the car in 93 degree heat and it is doing just fine. This is an 05 Cobb STG 1 STI. I am eager to see how many miles I can get out of the tank to see if I am really saving $4 a fill up. Thanks Hotrod for posting such valuable info!


Last edited by SpaceGhost; 08-20-2005 at 01:32 PM.
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Old 08-20-2005, 01:20 PM   #46
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I would love to hear why this is not a sticky..........
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Old 08-20-2005, 01:31 PM   #47
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Quote:
Originally Posted by SpaceGhost
I am eager to see how many miles I can get out of the tank to see if I am really saving $4 a fill up.
Regardless of your fuel economy (which should go down), you'll still pay $4 less per fill up.

Last edited by Jon [in CT]; 08-20-2005 at 01:38 PM.
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Old 08-24-2005, 08:56 AM   #48
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+1 for stickyness

If i can make my way out to a E85 pump I'll give it a whirl. I'm running these related mods:
04 STi with Perrin Modified 816cc injectors, FP Green, APS 650, Walbro pump, TXS TBE, UTEC.
If it works, i'll replace some c16 maps with E85 ones....

PS: Local news just ran a story on e85, that's why i found this thread. I wonder how long the lines will be....
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Old 08-24-2005, 09:44 AM   #49
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I've got some gallon jugs of reagent-grade ethanol. Can I dump these into my gas tank--like I do w/ xylene and toluene for an octane enhancer, or would EtOH not mix well?
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Old 08-24-2005, 09:57 PM   #50
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Phy6, I don't know where in MD you are, but if you are near the Navy Annex near the Pentagon ever, there is a gas station that is technically part of the base exchange, but it has alternative fuels including E-85 that you don't have to show and ID for.
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